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A single value modifier is a modifier which modifies only one value at one time step in a time series.
The forecaster can define a single value modifier in the modifier panel by selecting a date and a value.
The combination of the selected time and value is the definition of the single value modifier.
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The user can enter a value in the text box by entering a value and by clicking on the spinner box next to it.
The value can also be adjusted by the slider bar.
The date of the modifier can be selected in the area above which the forecaster can enter a value for the modifier.
The units of the modifier is shown at the right side of the slider bar.
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When a default value is configured the modifier will always default to that value.
In case the second option is chosen than it is possible to define a timeseries-filter from which the default value should be derived.
The modifier will look for a value at the time for which the modifier is defined.
The last option allows the forecaster to configure a statistical function from which the value should be derived.
Currently only the principal component analysis-functions support this option.
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First the id and name of the modifier is declared. In this case this instance of the singeValueModifier will be identified by wechng.
The timeSeries-part identifies that this modifier can be applied to any time series which have the parameter WECHNG.
The modifier has soft limits configured. These limits are used to limit the slider bar in the display.
In this example the slider bar will start at 0 and end at 5. But these soft limits can be overruled by manually typing a value lower than zero or higher than 5. The hardLimits identify the upper and lower limit of the mod and they can not be overruled.
This means that for this mod only the maximum value of the soft limit of 5 can be overruled because there is a minimum value configured in the hard limits of 0. A single value modifier is only applied at one time step. By default the time step is set to the start of the run in this modifier. The default value is set to 0.
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